• Power Management

    Exar provides innovative power solutions that simplify the power and system architecture in a wide variety of end markets for both line and battery-powered electronic equipment. read more...


    Exar's power management portfolio covers a wide range of DC to DC power conversion solutions, system controls and power monitoring as well as LED lighting applications.

    With over 30 years of analog and mixed-signal expertise, Exar's power solutions are trusted everyday to provide an unprecedented combination of high efficiency, high performance, board space optimization and improved system reliability while reducing costs and time to market.

  • Power Conversion

    Exar offers a complete family of DC to DC power conversion products from linear regulators and LDOs to high-performance switching regulators, controllers and modules covering applications with currents ranging from a few mA to 35A. Exar’s Universal PMICs and Programmable Power Modules provide an exceptional level of flexibility, ease of use, remote configurability and telemetry with solutions for the system designer to the most experienced power supply designer.

    The XRP6124 is a non synchronous step down (buck) controller for up to 5A point of loads. A wide 3V to 30V input voltage range allows for single supply operations from industry standard 3.3V, 5V, 12V and 24V power rails. With a proprietary Constant On-Time (COT) control scheme, the XRP6124 provides extremely fast line and load transient response while the operating frequency remains nearly constant. It requires no loop compensation hence simplifying circuit implementation and reducing overall component count. The XRP6124 also implements an emulated ESR circuitry allowing usage of ceramic output capacitors and insuring stable operations without the use of extra external components.

    The XRP7664/65 are synchronous current mode PWM step down (buck) regulators capable of a constant output current up to 2A and 3A. A wide 4.75V to 18V input voltage range allows for single supply operations from industry standard 5V and 12V power rails.

    System Controls

    Power delivery and system controls functions ensure electronic systems and equipments operate at the anticipated performance level and within the required safety margins. While stable voltage references guarantee accurate power generation, system supervisors monitor one or several voltage rails for abnormal operations. Power switches are key elements of power distribution providing on/off functionalities along ensuring over current protection for the equipment and peripheral systems.

    Exar Corporation offers a broad range of USB VBUS power distribution switches supporting both the USB 2.0 and latest USB 3.0 specifications. These devices, the SP/XRP252x series, are offered in single and dual channels configuration for maximum design flexibility. The XRP2527 and XRP2528 are generic single and dual channels power distribution switches capable of operating at input voltage as low as 1.8V supporting the typical 1.8V, 2.5V, 3.3V and 5V power rails. Current limit for each channel is programmable from 300mA up to 1A through an external resistor and achieves better than 8% accuracy.

    Precision adjustable shunt regulators provide a highly stable voltage reference as low as 1.24V. The XRP431L, a temperature compensated 1.24V to 18V precise adjustable shunt regulator with better than 0.5% accuracy, is offered in a space saving SOT23 package and only requires a mere 100µA to operate. 

    Universal PMICs

    Exar’s universal PMICs, including programmable power modules, offer advanced dynamic control and telemetry along with remote re-configurability.

    PowerArchitect™ design and configuration software speeds development and significantly reduces overall time-to-market compared to legacy analog power solutions. An I²C interface and multiple GPIO pins ensure easy system integration. Configurable warning and fault levels, fault behavior and power up and down sequencing ensure any load can be properly powered and protected. The power system design can be completed with confidence long before the final revision of the SoC or ASIC is available.

    Learn more about Exar’s Universal PMIC programmable power solutions, Download the Power Management Brochure today.

    Use Exar’s design and configuration software, PowerArchitect™ to get your design to market faster. Get your free Power Architect download.

    These easy to use Universal PMICs provide power solutions for any FPGA, SoC or DSP. Exar has collaborated with Xilinx to generate several Universal PMIC reference designs.

    Learn more about the Xilinx Reference Designs and other Exar products that support Xilinx FPGAs.

    The XRP7714 Zynq-7000 and Zynq-7020 Reference Designs are complete four output power systems designed to power the Xilinx Zynq-7000/7020 and associated DDR3 memory.

    Find out more about the Zynq Reference Design:

    Due to the flexibility of Exar’s Universal PMICs, these reference designs can also be configured to power other FPGAs and SOCs:

    These Universal PMICs can be programmed using programming hardware and software from third-party vendors.

    LED Lighting

    Efficiency, performance, size and reliability are rapidly imposing LEDs as the lighting solution of choice in architectural and accent lighting fixtures. Exar is the world leader in LED AC step driver solutions for downlights, high bay and specialty lighting. Our patented distributed architecture eliminates the need for magnetics, MOVs and electrolytic capacitors providing robust, cost effective and extremely small solutions for your lamp or luminaire with low flicker, high power factor and low THD.

    Exar also has solutions for low voltage LED MR16 applications, multichannel panel backlighting, and LED Flash from 500mA to 4.3Amps with analog or I2C control.